Rolling rubber fabrics for tires



Dec. 21,1926.

. O. H. ANDREWS ROLLING RUBBER mamas j'oR TIRES Filed April 16, 1925 considerable waste of rubber material.

Patented I Dec. 21, 1926.

UNITED STATES v r 1,611,400 PATENT, OFFICE.

OLIVER H. ANDREWS, OF STAMFORD, CONNECTICUT.

no LrNe RUBBER rnnn'rcs non Trans. 7

Application filed April 16, 1925. Seria1 lo. 23,519.

This invention relates to unv'ulcanized rubber compositibn and has to do with'means for wrapping and preserving the same, a an the rubber surfaces form contacting or in perspective view showing any way sticking, either together or to a separating medium so that the surfaces of the rubber fabric will at a'lltimes remain in unimpaired condition thereby eliminating One object of this invention is to enable the provision of rolls of rubber onrubberiied fabric of' any desired size ,and' weight in which the layers or .convolutions of the rubber fabric on'the reel or support are separated by a protecting sheet or liner c'ornprising a suitable fabric provided with coatings of treated cellulose xanthate or viscose, which in contact with the raw, rubber surfaces under any pressure will not stick tothe rubber thereby eliminating any tendency as heretofore of impairing the surfacesof the rubber.

Other objects of this invention will appear in the following description and appended claims, reference being had to the accompanying drawings forming a part of this specification, wherein like reference-characters indicate {corresponding parts inthe several views and wherein Fig. 1 is'af'diagraminatical view illustrating in general the manner in which the rolling of the rubber fabric may be accomplished and illustrating 9. rolled rubber fabric having a separating medium comprising a fabric coated with regenerated cellulose; Fig. 2 is a fragmentary superimposed layers of the rubber or rubberized fabric and the liner fabric. r

Before explaining in detail the present "improvement and mode of operation thereof, I desire to have it understood "that the invention is not limited to thedetails of construction and arrangement of parts which are illustrated in the accompanying drawings, since the invention is capable of other embodiments, and that the phraseology which I employ is: for the description and not of limitation.

In the manufacture of rubber tires, the tire fabric when prepared, is wound on a support to' form relatively lar e rolls. Or dinarily the fabric is'providgd with coats of .raw rubber andthe surface of the rubber 0 is gummy and adhesive. A supporting strip" or liner of suitable cloth fabric is usually interposed between the windings. or layers of rubber fabric when "rolling up the purpose of I fabric, or when rolling up sheets of raw rubber. This untreated cotton fabric hasv small fibres which form a fuzzon the sur-' face of the material, and cling to the rubber with considerable tenacity, and frequently causing a strong enough adhesion to pull 7 the gum out of shape or cause. the rubber coating to pull off on the liner when it is unrolled. This results in spoiling and imfl pairing thegum of the raw rubber sheet or rubberized fabric and renders its further use impraeticableQ It has been attempted to use as a liner a fabric coated with linseedoil, but this has. been found impracticable, not only on account of the great-expense incident thereto,

but on account of the fact that the linseed oil rarely lays down effectively the short projecting fibres or lint of the cloth and at most has. a temporary effect and must be continuously applied to the fabric at great 9 expense. 'i

I have discovered that by rolling up the raw rubber 01" rubber coated fabric with ar, separating" strip of material coated with re- K generated cellulose, the surfaces of the raw rubber or gum will be rotected against any tendency to adhereor ing' to the linen. The fabric liner may be coated on both sides in any suitable manner. 'For instance, a cellulose material such as cotton waste, wood pulp or the like is lsub 'ected to the action of caustic soda to form-a alkali cellulose'which is pressed out or otherwise treated to remove the excess of caustic soda, and there 'both sides of the fabric as" by means of a spreader or doctor blade and may be set or coagulated byyacuum process or heat treat- "ment, or may be treated with dilute sulphuric acid or fixed in any other suitable manner. The resulting fabric is thus provided at each side with a coating of regenerated cellulose,

which if it has been acid treated is, after washing to remove the excess acid, pliable and flexible and presents smooth glazed-like surfaces which 'I have found will not adhere to the surfaces of raw gum or rubber even under considerable pressure. Not only does this flexible regenerated cellulose coating lay down thoroughly the small fibres or fuzz of W trate'd diagrammaticall a manner in which a tire fabric coated wit gum or raw rubber is rolled up together with a regenerated cellulose coated fabric. The strip of raw rubber .or gum 9 is passed through a pair of calender rolls 10 and 11 rotated by any' suitable mechanism in the'direction of the arrows.

The tire fabric 12 which is carried on a suitable rol1'13 is also directed between the calender rolls 10 and 11 and the gum or rub- I bar 9 is applied in acoatingto the surfaces of the fabric 12. .The rubber coated fabric 13 ma 'then 'be'guided over. suitable rollers 14 an 1 5,.to a .reel ,or support 16' which is rotated by suitable mechanism at a predetermined speed. The liner fabric 17 coated on opposite sides with regenerated cellulose is carried on a reel 18 suitably supported on astandard 19, and this liner 17 is wound simultaneously with the rubber fabric 13 upon the reel 16. The windingvor reeling of the rubber and liner ,fabrics on the support 16 results in causing considerable pressure between the surfaces of the regenerated celluloseand the raw rubber, and especially where the fabrics are wound large rolls having consigerable size and weight. I have found howev r that the regenerated cellulose surfaces will not stick tothe gumor raw rubber'under any pressure, so-that as a re- I sult the percentage of loss as heretofore .due

to theimpairment of the rubber in the rolls is entirely eliminated thereby resultingin a further appreciable saving imthe 'cost of manufacture of rubber tires or otherv rubber goods and enabling the preparation of the g rolls of rubber fabric to be accomplished at a great saving in expense.

It isto be understood that bydescribing in detail herein any particular-form, structure or arrangement, it' is not intended, to

' limit the invention beyond theterms of the so. v prior art.

' said invention an "05 several claims or thelirequiremnts of the lained thenature of I described a way of constructing and using the same, although without attempting to set forth all of the forms Having thus ex coated with regenerated cellulose interposed between the windings ofthe rubber strip and forming a non-adhesive protecting medium in contact with the rubber surfaces of the rubber strip. f

3. The rolling or winding on a support of a fabric coated on both sides with raw rubber and with a separating strip of fabric coated on both sides with regenerated cellulose interposed between the layers of rubber fabric on the support.

4. The rolling or winding of a rubber coated fabric on a strip of cloth fabric coated with regenerated cellulose interposed betweenrthe windings of the rubber fabric and forming a non-adhesive protecting medium in contact with the rubber surfaces of said' rubber fabric.

5. A support and a strip of raw rubber wound thereon in layers and having a proerated cellulose interposed between the layers and forming a non-adhesive protecting medium in contact withthe rubber surfaces.

.6. A support and two strips of material placedthereon in layers, one strip having a raw rubber surface and the other strip having a surface of regenerated cellulose forming a non-adhesive and protecting medium in contact with the raw rubber surface.

7. A support and two strips of material tecting strip ofmate rial coated with regen-.

support with a separating wound thereon in layers, one strip compris- 8. The combination of a strip of material having an adhesive rubber surface, and-a -non-adhesive strip thereon havin a -non-adhesive surface of regenerated ce ulose.

9. The combination of a strip of'material having an adhesive rubber surface and a non-adhesive strip thereon having a non-adhesive surface of regeneratedcellulose formed by the regeneration of cellulose xanthate or viscose.

10. A' method of preserving the tackiness 4 of .an unvu' lcanized; rubber surface which,

1 comprises covering the surface with a textile material coated with regenerated cellulose. my 11. A material' for protecting a plastic I a fibrous material coated. 7

surface comprising with regenerated cellulose.

' 12. A material for protecting a raw rub 4 ammo f3 ber composition comprising a fibrous sheet prising an unvulcanized rubber composition material coated with a regeneratedcellulose provided with a protecting coating includcomposition. t ingfabric treated with regenerated cellulose. 15 .13. A material for protecting a raw rub- "16. A v,ulcanizable rubber member 00m- "I ber com osition comprising a fabric mateprisin an unvulcani'zed rubber composition rial ren' ered impervious by a regenerated provied with a protecting coatingincludcellulose composition. mg fabric treated with a regenerated cellu- '14. Av material for protecting a raw rublose com sition. I l ber composition comprising a. fabric mate- Signe at 1822 Park Rowv Bldg, New

1"ria1 coated with viscose regenerated to form Yorkcity, cou'nt' and State of New York regenerated cellulose this 11th day of ril, 1925 15. A vulcanizable rubber member com- OLEVER H.' ANDBEWS. 

